Nut-lock.



E. A. DOTY. NUT LOCK. APPLICATION FILED NOV. 7, 1913.

Patented Mar. 30, 1915.

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EDWIN A. IDOTY, 0F ALBANY, NEW YORK.

NUT-LOCK.

Specification of Letters Patent.

Patented Mar. 30, 1915.

Application filed November 7, 1913. Serial No. 799,718.

, To all whom it ma concern Be it known t at I, EDWIN A. DOTY, a citizen of the United States, residing at Albany, in the county of Albany and State of New York, have invented new and useful Improvements in Nut-Locks, of which the following is a specification.

This invention relates to a nut lock of that type which is provided with a spur adapted'to be driven into the screw shank of the bolt between two of its threads for the purpose of preventing backward rotation of the'nut on the bolt. 7

It is the object of this invention to provide a nut lock of this character which is comparatively simple and inexpensive. in construction, which can be readily and quickly applied to a bolt for holding the nut thereon in place and which permits further tightening of the nut and the lock to be easily effected after the lock has been once secured without impairing the efliciency of the same. i

,In the accompanying drawings: Figurel isl'a longitudinal sectional elevation of a nut and bolt provided with one form of nut lock embodying my improvements. Fig. 2 is atransversesection of the same, taken in line 2-2, Fig. 1. Fig. 3 is a detached side elevation of the body of the nut lock shown in Figs. 1 and2. Fig. 4 is a detached per-p spective view of the clip forming part .of thenut lock hown in Figs. 1 and 2. Fig.

5 is a similar view showing a slightly different form of clip from that shown in Fig. 4:. Fig. 6is a similar view showlng stillianother formof clip or fastener embodying my invention and capable of use mic-onnection withthe body shown in Figs.

1', 2 and-3. Fig. 7 is a'perspective view showing still another form of nut lock constructed in accordance with my invention.

Fig. 8 is a perspective view showing another form of clip or fastener coming withinthe scope of my-invention. a 3

Similar characters of. reference indicate corresponding parts throughout the several views.

1 represents the shank of an ordinary bolt provided with external screw threads 2-at one end and a head 3 at the other end, and 4 represents the nut which engages with the thread of the shank and is adapted to be held against backward rotation on the shank.

Although the nut lock containing my inventionmay be variously constructed it preferable to make the same of sheet metal inasmuch as the same in this form can be produced at comparatively low cost.

My invention may be embodied invarious forms, that shown in Figs. 1, 2, 3 and 4 belng constructed as follows: 5 represents an annular or ring-shaped body having an opening 6 the diameter of which is equal to the diameter of the outer edges of the threads of the bolt shank so that thisbody may be slipped overthe threaded portion of the same. On one side of its opening the nut lock body is provided with an inwardly projecting retaining lug 7 which is preferably set-oif outwardly from the body and on its opposite side the bore of this opening of the body is provided with a notch or recess 8 forming two shoulders 9, 9 at opposite ends of the notch in a direction circumferentially of the body. This notched portion of the nut lock body is embraced by a clip or fastener which is constructed to engage the threaded part of the boltshank and hold thenut against backing up. In its preferred form this clip comprises a web 10 arranged along one side of the lock body, preferably the advancing side, a lip 12 arranged in the notch 8 of the body and connected with the lower end of the web and projecting outwardly along the opposite or trailingside of the body, and a plate 11 connected with the outer edge of the web and extending-over the adjacent edge portion of; the body and inwardlyalong the same side of the body on which the lip is arranged and provided at its inner end with two spurs 13,14. These spursare arranged.

side by side in a direction circumferentially of the opening in the lock body and the front or advancing spur 13is provided with a blunt or dull inner end while therear or trailing spur lit is provided with a sharp or pointed inner end, as shown in Figs. 2 and 4:. The inner ends of the twospurs of the clip project across the adjacent portion of the body opening so that-the same together with the retaining lug 7 on the opposite side of the body in effect form an internal thread whereby this nut lock may be screwed forwardly upon the thread of the bolt shank until the advancing side of the nut lock bears tightly against the rear or trailing end of the nut 4. After being thus tightened the spurs of the clip are driven inwardly against the threaded part of the bolt shank by delivering the blow of the hammer or similar instrument against the.

outer part of the spur plate. of the clip,

thereby causing the sharpened rear "spar to be driven more or less into the threaded bolt shank and preventing backward rotation of the; put/lock fon the bolt shank and holding the nut against backing up thereon. Upon driving the spurs of the clip inwardly the front or advancing spur-owing to its dull or blunt inner end'doesinot enter the metal of the bolt shank; 1The nut' lock is therefore. free to be turned forwardly on the screw shank for following up the nut if the latter requires furthertightening, after whichthe nut lock maybe again secured in placeby another blow against the spur plate wh ch will cause its'sharpened rear spur toaga n ,-'-'dig into. the screw shank. Itwill therefore tightened the same is free to bernoved for ward and further tightened aga nst the nut f if this should become necessaryinasmuch as V be apparent that while this nut lockis' in- 7 capable of backwardmotion after being once the blunt ended front spurof the spurplate prevents this spur from digging into the screw shankand holding-the body of the of soft "metal such as sheet iron whilethe clip is preferably constructed of a harder metal such' as' sheet steels By thus constructing the body andiclip of the nut lock in two pieces a low priced metaljm'ay be employed for'the body inasmuch as the same is not subjected to any severe strains and the higher priced metal maybe employed for the clip which is "subjected to harder usage by' reason of its points being driven 7 against the screw shank, thereby enabling the. nut lock" to be produced at much lower cost than" if the entire structure were made of one piece because in that case the body as well as the spurs would. have to a' higher priced hard material. 7

Although my improved nut lock is repbe made of resented in Figs. 1 and 2 with the spurs on the trailing side of the body the lug "11 can" i be bentacross-the opposite side'of so that the spurs are'arranged on the ad-.

the body vancing side of the body. It is preferable, however,-to apply the nut lock on the screw shank withflthe spurs on the trailing side, of:

the body inasmuch as the spurs in this powith sharpened. or

' sition offthe parts can be driven more readilY again st thefthreaded part of.theb01t shank.'-@

'If desired, both i the front and rear spurs 15, l6sof the spur plate '17 may be provided pointed inner ends, as, shown in' Fig. 5, which-construction is suit-1 able for use where-ithe'lockshouldbe'held of the nut on the bolt,

against forward and backward rota- 131011 on thebolt after being once applied.

For some purposes itwill also suffice to providenthe spur plate 18 with only a single spur 19 which is arranged to trailand provided'w'itha sharpened innerend for en the screw shank,as shown in gagementwith Fig. F 7

When the costof materialis'not an ele-f j ment to be taken into consideration the spur plate 20 having a dullfront spur 21 and'a pointed rear spur'22'may be formed in one piece with the outer portion of the lock body 23 opposite the retaining lug 24, as shown in Fig. 7. a

metal, as shown in Figs. 1, 2, 4, 5 and6 the j 8 Instead of constructing the clip of sheet" same maybe'constructed of round wire, as

shown in Fig. 8, whichIlast-mentioned con struction comprises a web'2 5 adapted toenwardly turned lip 26 adapted to" project through the notch of the body and engage with the opposite side thereof, and a single. spur 27 projecting'fromthe outer edge V of 85 gage with one side of the lock body,'an out-J said web inwardly along the last'mentioned side of thelock body, so that itoperates in' substantially the same struction of clip shown in Fig-6. 7 V

The various forms of nutlockhere shown improvement materials and unskilled help, I thereby enabling these goods to be marketedat a price-' which is not prohibitive but permits of using the same extensively, particularly for" This nut lock can also railroad purposes. be very conveniently applied to the bolts without any special tools for this purpose and after being once put in place the'same aflord absolute security I claim as-rny invention: r

1'. A nut lock comprising a 'perforated ,body adaptedto receive the threaded shank providedwith a plate having, 7 pro ectlng spurs arranged cir-f of a bolt and two inwardly manner as the con-Q against 1 loosening 5 and containing various modifications of'my can all be constructed at very low cost bythe employment of'low priced,

cumferentially about the opening of the body, the front or "advancing" spur having a blunt or dull inner end and'the rear or" trailing spur having a sharp or pointedin- Y ner end, whereby uponf driving the plate, inwardly the dull spur supports the sharp spur and causes the latter to enter the bolt for preventing backward rotation of the" permitting forward".

lock, on the bolt while rotation thereof.

2.'A nut lock comprising ayperforated' body adapted to receive thejthreaded shank" of a" bolt and provided with an inwardly ing spurs arranged side by'side circumferentially around said opening the front'or v advancing spur having {abluntlordull in-= turned plate having two inwardly 'projecta sharp or pointed inner end, whereby upon ner end while the rear or trailing spur has driving the plate inwardly the dull spur supports the sharp spur and causes the latter to enter the bolt for preventing backward rotation of the lock on the bolt while permitting forward rotation thereof.

3. A nut lock comprising a body having an opening adapted to receive the threaded shank of a bolt, and a clip embracing said body and having a web on one side of the body, a lip arranged on the inner end of the web and projecting outwardly along the opposite side of the body, and a spur arranged on the outer end of the web and projecting inwardly along the last mentioned side of the body and adapted to engage the thread of the bolt.

i. A nut lock comprising a body having an opening adapted to receive the threaded shank of a bolt, and a clip embracing said body and having a web on one s ide of the body, a lip arranged on the inner end of the web and projecting outwardly along the opposite side of the body, and a spur arranged on the outer end of the web and projecting inwardly along the last mentioned side of the body and adapted to engage the thread of the bolt, said body being provided in its bore or inner edge with a notch which receives the lip of said clip.

5. A nut lock comprising a body having an opening adapted to receive the threaded shank of a bolt, and a clip embracing said body and having a web on one side of the body, a lip arranged on the inner end of the web and projecting outwardly along the opposite side of the body and two spurs arranged side by side on the outer end of the web and projecting inwardly therefrom along the last mentioned side of the body and adapted to engage the thread of the bolt, the front or advancing spur having a dull or blunt inner end while the rear or trailing spur has a sharp or pointed inner en Witness my hand this 5th day of November, 1913.

EDWIN A. DOTY. Witnesses:

WILLIAM SCOTT,

GEO. F. PRILIPPER.

copies ot this patent may be obtained to: in oenti each, by nddreuin: the Commissioner of Patents, Washington, D. 0'.

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